From owner-freebsd-current@FreeBSD.ORG Fri Oct 7 07:48:42 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 621C516A422 for ; Fri, 7 Oct 2005 07:48:42 +0000 (GMT) (envelope-from stijn@pcwin002.win.tue.nl) Received: from kweetal.tue.nl (kweetal.tue.nl [131.155.3.6]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4499143D53 for ; Fri, 7 Oct 2005 07:48:39 +0000 (GMT) (envelope-from stijn@pcwin002.win.tue.nl) Received: from localhost (localhost [127.0.0.1]) by kweetal.tue.nl (Postfix) with ESMTP id 024E913B938 for ; Fri, 7 Oct 2005 09:48:38 +0200 (CEST) Received: from kweetal.tue.nl ([127.0.0.1]) by localhost (kweetal.tue.nl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 27442-01-11 for ; Fri, 7 Oct 2005 09:48:21 +0200 (CEST) Received: from umta.win.tue.nl (umta.win.tue.nl [131.155.71.100]) by kweetal.tue.nl (Postfix) with ESMTP id 6B0AE13B90A for ; Fri, 7 Oct 2005 09:45:20 +0200 (CEST) Received: from pcwin002.win.tue.nl (pcwin002 [131.155.71.72]) by umta.win.tue.nl (Postfix) with ESMTP id 6362131401D for ; Fri, 7 Oct 2005 09:45:20 +0200 (CEST) Received: by pcwin002.win.tue.nl (Postfix, from userid 1001) id 48CF340E4; Fri, 7 Oct 2005 09:45:20 +0200 (CEST) Date: Fri, 7 Oct 2005 09:45:20 +0200 From: Stijn Hoop To: freebsd-current@freebsd.org Message-ID: <20051007074520.GS86136@pcwin002.win.tue.nl> References: <20051006075312.GM86136@pcwin002.win.tue.nl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="uZ3hkaAS1mZxFaxD" Content-Disposition: inline In-Reply-To: <20051006075312.GM86136@pcwin002.win.tue.nl> User-Agent: Mutt/1.4.2.1i X-Bright-Idea: Let's abolish HTML mail! X-Virus-Scanned: amavisd-new at tue.nl Subject: Re: interrupt throttling stepping in too soon? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Oct 2005 07:48:42 -0000 --uZ3hkaAS1mZxFaxD Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Followup to my own problem: On Thu, Oct 06, 2005 at 09:53:12AM +0200, Stijn Hoop wrote: > On the console there were multiple DMA_TIMEOUT messages for the disks of > the array, and just above those was a line about an 'interrupt storm for > atapci0, throttling'. After a rebuild which completed succesfully, I rsynced data to the disks. About 5 minutes later the same message appeared and the machine panic'd, this time destroying /var/log with it :-/ Anyway, I decided to hammer the disks without waiting a long time for gvinu= m=20 to build an array, and indeed I can reproduce this by mounting all 4 drives, and for each drive dd'ing the whole drive to /dev/null plus rsync'ing data to it at the same time. It held up at 20 MB/s but I suspect that the box isn't keeping up with the combined total of interrupts because it goes down faster when I engage the network (rsync from a remote box). So, I guess my question becomes: is there a way to find out why this box can't handle enough interrupts? Could it be that the motherboard is flawed? Is this definitely a hardware error or is it still possible that the interrupt throttling is stepping in too soon and thus screwing the rest of the system? On a sidenote, I monitored systat -vmstat while doing the above and it appeared that IRQ 11 (ATA controller) was doing around 1000-1100 irqs/s, and IRQ 5 (xl0) was doing around 800-1000 irqs/s. Is there a way to log this somehow? *grumbling-something-about-i386-hardware*'ingly yours, --Stijn --=20 "Linux has many different distributions, meaning that you can probably find one that is exactly what you want (I even found one that looked like a Unix system)." -- Mike Meyer, from a posting at questions@freebsd.org --uZ3hkaAS1mZxFaxD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDRieQY3r/tLQmfWcRAqo4AJ0egIFihSul58257FRND/cQ/UoKOACeOv77 6JPqJKzNE0YmOfGSILUTCdw= =PBFG -----END PGP SIGNATURE----- --uZ3hkaAS1mZxFaxD--